coder/xum

A desktop app for isolated, parallel agentic development

About the project

coder/xum is a desktop application for running coding agents in isolated, parallel workspaces, either locally, through Git worktrees, or on remote servers over SSH. It helps developers manage multiple agents, models, code changes, reviews, costs, and agent status from one interface. The catalogue skills, instructions, agents, settings, and command define workflows for using Xum.

This repository also configures its own agents. See what xum tells them →

2.1kStars on the repository
18Mods indexed here, across every type
todayLast push, which is what freshness is scored on
AGPL-3.0Licence, which decides whether bodies are shown

deep-review

01

coder/xum

Skill Claude CodeCodex

Sub-agent powered code reviews spanning correctness, tests, consistency, and fit.

not rated 2.1k +9 today A SkillSpector: warn 17 tokens AGPL-3.0

dev-desktop-sandbox

02

coder/xum

Skill Claude CodeCodex

Run isolated xum desktop (Electron) instances (temp XUMROOT + free ports).

not rated 2.1k +9 today A SkillSpector: warn 24 tokens AGPL-3.0

dev-server-sandbox

03

coder/xum

Skill Claude CodeCodex

Run multiple isolated xum dev-server instances (temp XUMROOT + free ports).

not rated 2.1k +9 today A SkillSpector: warn 22 tokens AGPL-3.0

coder/xum

Skill Claude CodeCodex

Regenerate high-resolution README screenshots from Storybook stories. Use this skill when visual diffs are detected in any story under "Docs/README Screenshots", or when story data/layout changes require updated documentation assets. Triggers on: visual regressions in readme screenshot stories, changes to…

not rated 2.1k +9 changed 1mo ago A SkillSpector: warn 93 tokens AGPL-3.0

pull-requests

05

coder/xum

Skill Claude CodeCodex

Guidelines for creating and managing Pull Requests in this repo.

not rated 2.1k +9 changed 1mo ago A SkillSpector: warn 15 tokens AGPL-3.0

react-effects

06

coder/xum

Skill Claude CodeCodex

Guidelines for when to use (and avoid) useEffect in React components.

not rated 2.1k +9 today A SkillSpector: warn 18 tokens AGPL-3.0

tbench

07

coder/xum

Skill Claude CodeCodex needs its repo

Terminal-Bench integration for Xum agent benchmarking and failure analysis.

not rated 2.1k +9 changed 24d ago A SkillSpector: pass 15 tokens AGPL-3.0

bug-bash

08

coder/xum

Skill Claude CodeCodex

Run an agent bug bash of the Xum web UI in the bug-bash sandbox (TesterArmy e2e explore charters, each in its own locked-down Docker container with a seeded xum server), then verify each finding with a failing repro test. Use when asked to "bug bash" Xum, run e2e explore agents, the MCP Apps suite or the story tests…

not rated 2.1k +9 changed yesterday A 100 tokens AGPL-3.0

crap-gate

09

coder/xum

Skill Claude CodeCodex

Read and fix CRAP gate findings (crap-check, the commit hook report, Quality / CRAP). Use when a crap-gate or crap-check report names a function, before splitting or testing a complex function, or when deciding on a Crap-Debt trailer.

not rated 2.1k +9 changed 2d ago A 60 tokens AGPL-3.0

gauntlet

10

coder/xum

Skill Claude CodeCodex

Read and fix DRY and mutation gate findings (make dry-check, make mutate-check, Quality / DRY, Quality / Mutation). Use when a report names a new near-duplicate or a surviving mutant, or before you copy a function and edit the copy.

not rated 2.1k +9 today A 57 tokens AGPL-3.0

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